Slurry leakage prevention tool for segmental beam prefabricated formwork

Abstract

The utility model provides a grout leakage prevention tool for a segmental beam prefabricated formwork, and belongs to the technical field of bridge construction. The grout leakage prevention tool for the segmental beam prefabricating formwork comprises two semi-ring type rubber sleeves, a sleeve hole used for being sleeved with a steel bar is formed in the center of each rubber sleeve, the front end of the outer surface of each rubber sleeve is of a semi-column-shaped structure, and the rear end of the outer surface of each rubber sleeve is of a semi-frustum-shaped structure. The sealing device has the advantages of being good in sealing effect, simple in structure and convenient to use.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction, and particularly relates to a slurry leakage prevention tool for segment beam prefabrication formwork. Background Technique

[0002] In bridge construction, some precast segment beams of bridges are prefabricated in segment beam yards. Since the precast beam formwork is divided into side formwork, bottom formwork and end formwork, and reserved steel bar holes and prestressed duct holes are provided on the end formwork, anti-slurry leakage measures need to be set for the reserved steel bar holes and prestressed duct holes on the end formwork. If traditional anti-slurry leakage measures are adopted, such as plugging the reserved steel bar holes and prestressed duct holes with measures like hemp wadding, etc., but these measures cannot effectively prevent the formwork from leaking slurry, resulting in poor appearance quality of the beam body, and even concrete aggregate leakage at serious slurry leakage parts. Content of the Utility Model

[0003] To solve the above technical problems, the utility model proposes a slurry leakage prevention tool for segment beam prefabrication formwork.

[0004] The technical solution of the utility model is realized as follows:

[0005] A slurry leakage prevention tool for segment beam prefabrication formwork includes two semi-circular rubber sleeves. A sleeve hole for sleeving steel bars is arranged at the center of the rubber sleeve. The front end of the outer surface of the rubber sleeve is in a semi-columnar structure, and the rear end of the outer surface of the rubber sleeve is in a semi-cone frustum structure.

[0006] Further, a first jack is arranged on one side of the butt joint surface of the rubber sleeve, and a first plug block adapted to the first jack is arranged on the other side of the butt joint surface of the rubber sleeve.

[0007] Further, an outer expansion groove is arranged at the tail end of the rubber sleeve. The outer expansion groove is semi-circular. Both ends of the outer expansion groove penetrate through both sides of the butt joint surface of the rubber sleeve, and the cross-section of the outer expansion groove is in a conical structure. A semi-circular outer expansion ring capable of radial displacement is arranged in the outer expansion groove. The semi-circular outer expansion ring bends the inner and outer surfaces of the tail end of the rubber sleeve inwards and outwards respectively by moving forward in the outer expansion groove.

[0008] Further, limiting parts are arranged on the inner wall surfaces of both sides of the notch of the outer expansion groove, and limiting grooves adapted to the limiting parts are arranged at the tail ends of both the inner and outer surfaces of the semi-circular outer expansion ring.

[0009] Further, a semi-threaded ring is arranged at the front end of the inner cavity of the outer expansion groove, and a semi-circular threaded groove adapted to the semi-threaded ring is arranged at the front end of the semi-circular outer expansion ring.

[0010] Further, an installation plate with a "T"-shaped end face is arranged at the front end of the semi-threaded ring, and the installation plate is fixedly embedded in the rubber sleeve.

[0011] Further, a second jack is provided on one side of the semi-circular outward expansion ring docking surface, and a second plug block is provided on the other side of the semi-circular outward expansion ring docking surface and is matched with the second jack.

[0012] Further, a plurality of operation holes are provided on the rear end surface of the semi-circular outward expansion ring.

[0013] The utility model has the following beneficial effects:

[0014] 1. During the prefabrication construction of the bridge segment beam, the reserved steel bar holes and the prestressed duct holes of the segment beam prefabrication formwork are sealed, the phenomenon of slurry leakage in the segment beam prefabrication formwork is avoided, and the appearance quality of the segment beam is improved.

[0015] 2. By utilizing the cooperation of the semi-circular threaded ring and the semi-circular threaded groove, the two semi-circular outward expansion rings can be directly screwed forward, and the inner sides of the tails of the two rubber sleeves can be bent inwards and closely attached to the surface of the steel bar by the two semi-circular outward expansion rings, and the outer sides of the tails of the two rubber sleeves are bent outwards and abutted against the edge of the reserved hole opening, so as to improve the sealing effect on the reserved hole. Description of the drawings

[0016] Figure 1 is a schematic diagram of Embodiment 1 of the utility model;

[0017] Figure 2 is a schematic diagram of Embodiment 2 of the utility model;

[0018] Figure 3 is the utility model Figure 2 of the cross-sectional view;

[0019] Figure 4 is the utility model Figure 3 of the enlarged view at A;

[0020] In the figure: 1, rubber sleeve; 2, first jack; 3, first plug block; 4, outward expansion groove; 5, semi-circular outward expansion ring; 6, limiting part; 7, limiting groove; 8, semi-threaded ring; 9, semi-circular threaded groove; 10, mounting plate; 11, second jack; 12, second plug block; 13, operation hole. Detailed implementation manners

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the utility model without creative efforts shall fall within the protection scope of the utility model.

[0022] Please refer to Figure 1, A slurry leakage prevention tool for precast segmental beam formwork in this Embodiment 1 includes two semi-circular rubber sleeves 1. A sleeve hole for sleeving steel bars is provided at the center of the rubber sleeve 1. The front end of the outer surface of the rubber sleeve 1 is in a semi-cylindrical structure, and the rear end of the outer surface of the rubber sleeve 1 is in a semi-tapered structure.

[0023] During the application process, after sleeving the two semi-circular rubber sleeves 1 on the steel bars to form a complete ring structure, then insert the front end of the rubber sleeve 1 into the reserved hole, and use a rubber hammer or other tools to directly hammer the entire rubber sleeve 1 into the reserved hole. During this process, the entire rubber sleeve 1 is inserted into the reserved hole under pressure and tightly adheres to the reserved hole and the steel bars by using its own flexible function, realizing the plugging of the reserved hole.

[0024] Please refer to Figures 2 to 4 , In Embodiment 2, a first jack 2 is provided on one side of the docking surface of the rubber sleeve 1, and a first plug 3 adapted to the first jack 2 is provided on the other side of the docking surface of the rubber sleeve 1. During the process of sleeving the two semi-circular rubber sleeves 1 on the steel bars, by inserting the first plug 3 on one rubber sleeve 1 into the first jack 2 on the other rubber sleeve 1, it can ensure that the two semi-circular rubber sleeves 1 are more regular after docking, and when the docked two rubber sleeves 1 are hammered into the reserved hole as a whole, there will be no offset between the two rubber sleeves 1, so as to ensure good sealing of the reserved hole.

[0025] An outer expansion groove 4 is provided at the tail end of the rubber sleeve 1. The outer expansion groove 4 is semi-circular. Both ends of the outer expansion groove 4 penetrate both sides of the docking surface of the rubber sleeve 1, and the cross-section of the outer expansion groove 4 is in a tapered structure. A semi-circular outer expansion ring 5 capable of radial displacement is provided in the outer expansion groove 4. The semi-circular outer expansion ring 5 bends the inner and outer surfaces of the tail end of the rubber sleeve 1 inward and outward respectively by moving forward in the outer expansion groove 4. After inserting the two semi-circular rubber sleeves 1 into the reserved hole, by moving the semi-circular outer expansion ring 5 inward, the inner and outer parts of the rear end of the rubber sleeve 1 located in the outer expansion groove 4 will bend inward and outward respectively. At this time, the part located outside the outer expansion groove 4 will more closely abut against the edge of the hole opening of the reserved hole, and the part located inside the outer expansion groove 4 will more closely adhere to the surface of the steel bar, thereby further improving the sealing of the reserved hole.

[0026] Limiting parts 6 are provided on the inner wall surfaces of both sides of the notch of the outer expansion groove 4, and limiting grooves 7 adapted to the limiting parts 6 are provided at the tail ends of the inner and outer surfaces of the semi-circular outer expansion ring 5. By blocking the limiting parts 6 in the limiting grooves 7, it can prevent the semi-circular outer expansion ring 5 from detaching from the outer expansion groove 4, and at the same time, unify the initial positions of the semi-circular outer expansion rings 5 in the two rubber sleeves 1.

[0027] At the front end of the inner cavity of the external expansion groove 4, a semi-threaded ring 8 is provided. At the front end of the semi-circular external expansion ring 5, a semi-circular threaded groove 9 adapted to the semi-threaded ring 8 is provided. After the two rubber sleeves 1 are butted, the two semi-threaded rings 8 are combined into a complete threaded ring, and the two semi-circular threaded grooves 9 are combined into a complete circular threaded groove. Further, after the two semi-circular rubber sleeves 1 are combined and inserted into the reserved hole, by rotating the two semi-circular external expansion rings 5, the two semi-circular external expansion rings 5 as a whole are screwed forward outside the complete threaded ring formed by the combination of the two semi-threaded rings 8 through the combined circular threaded groove, so that the semi-circular external expansion ring 5 bends the inner and outer sides of the tail end of the rubber sleeve 1 inward and outward respectively, so that the rubber sleeve 1 seals the orifice of the reserved hole and closely adheres to the surface of the steel bar, improving the plugging effect of the reserved hole.

[0028] At the front end of the semi-threaded ring 8, a mounting plate 10 with a "T"-shaped end face is provided. The mounting plate 10 is fixedly embedded in the rubber sleeve 1. The mounting plate 10 is used to stably mount the semi-threaded ring 8 in the rubber sleeve 1. At the same time, when the semi-threaded ring 8 pulls the semi-circular external expansion ring 5 forward through the threaded groove, it has a stable force-receiving effect, preventing the semi-threaded ring 8 from separating from the rubber sleeve 1.

[0029] On one side of the butting surface of the semi-circular external expansion ring 5, a second jack 11 is provided. On the other side of the butting surface of the semi-circular external expansion ring 5, a second plug 12 matched with the second jack 11 is provided. By using the cooperation of the limiting part 6 and the limiting groove 7, the semi-circular external expansion rings 5 on the two rubber sleeves 1 are located at the rearmost position in the initial state. At this time, after directly putting the two rubber sleeves 1 on the steel bar, the two rubber sleeves 1 are axially fixed through the cooperation of the first jack 2 and the first plug 3. At the same time, the two semi-circular external expansion rings 5 are axially fixed through the cooperation of the second jack 11 and the second plug 12, so as to ensure that in the subsequent operation process, the two semi-circular external expansion rings, the two rubber sleeves 1 and the two semi-threaded rings 8 are all axially fixed.

[0030] On the rear end face of the semi-circular external expansion ring 5, a plurality of operation holes 13 are provided. During the process of rotating the semi-circular external expansion ring 5, the steel bar can be inserted into the operation hole 13, and then hold the steel bar to exert force, which is more convenient for operation.

[0031] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A leakage prevention tool for precast segment beam formwork, characterized in that It includes two semi-ring-shaped rubber sleeves (1). A sleeve hole for sleeving steel bars is provided at the center of the rubber sleeve (1). The front end of the outer surface of the rubber sleeve (1) is in a semi-columnar structure, and the rear end of the outer surface of the rubber sleeve (1) is in a semi-cone frustum structure; An outward expansion groove (4) is formed at the tail end of the rubber sleeve (1). The outward expansion groove (4) is semi-circular. Both ends of the outward expansion groove (4) penetrate through both sides of the butt joint surface of the rubber sleeve (1). And the cross-section of the outward expansion groove (4) is in a conical structure. A semi-circular semi-ring-shaped outward expansion ring (5) capable of displacing radially is arranged in the outward expansion groove (4). The semi-ring-shaped outward expansion ring (5) bends the inner and outer surfaces of the tail end of the rubber sleeve (1) inwards and outwards respectively by displacing forwards in the outward expansion groove (4).

2. The anti-leakage slurry tool for precast segment beam formwork according to claim 1, characterized in that, A first jack (2) is formed on one side of the butt joint surface of the rubber sleeve (1), and a first plug (3) adapted to the first jack (2) is arranged on the other side of the butt joint surface of the rubber sleeve (1).

3. A slurry leakage prevention tool for precast segmental beam formwork according to claim 1, characterized in that Limiting parts (6) are arranged on the inner wall surfaces of both sides of the notch of the outward expansion groove (4), and limiting grooves (7) adapted to the limiting parts (6) are arranged at the tail ends of the inner and outer surfaces of the semi-ring-shaped outward expansion ring (5).

4. A slurry leakage prevention tool for precast segmental beam formwork according to claim 1, characterized in that, A semi-threaded ring (8) is arranged at the front end of the inner cavity of the outward expansion groove (4), and a semi-circular threaded groove (9) adapted to the semi-threaded ring (8) is arranged at the front end of the semi-ring-shaped outward expansion ring (5).

5. A slurry leakage prevention tool for segmental beam precast formwork according to claim 4, characterized in that, An installation plate (10) with a "T"-shaped end face is arranged at the front end of the semi-threaded ring (8), and the installation plate (10) is fixedly embedded in the rubber sleeve (1).

6. The anti-leakage slurry tool for precast segmental beam formwork according to claim 4, characterized in that A second jack (11) is formed on one side of the butt joint surface of the semi-ring-shaped outward expansion ring (5), and a second plug (12) cooperating with the second jack (11) is arranged on the other side of the butt joint surface of the semi-ring-shaped outward expansion ring (5).

7. A slurry leakage prevention tool for precast segmental beam formwork according to claim 4, characterized in that, A plurality of operation holes (13) are arranged on the rear end face of the semi-ring-shaped outward expansion ring (5).

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